One can become a Member of BIX by providing the ISP License along with AS Number & IP Prefix.

The ISP License can be obtained from the Telecom Regulatory Authority (TRA)

The AS Number & IP Prefix can be obtained through the Regional Internet Registry (RIR) of Internet Assigned Numbers Authority (IANA). The Réseaux IP Européens Network Coordination Centre(RIPE NCC) is the RIR for Europe, the Middle East and parts of Central Asia. The others are
APNIC, LACNIC,
ARIN and AfriNIC .